%%
%% The LaTeX Companion, 3ed
%%
%% Example 12-3-30 on page II-250 in "newpxmath --- Using the PX fonts for math".
%%
%% Copyright (C) 2022 Frank Mittelbach
%%
%% It may be distributed and/or modified under the conditions
%% of the LaTeX Project Public License, either version 1.3c
%% of this license or (at your option) any later version.
%%
%% See https://www.latex-project.org/lppl.txt for details.
%%

\documentclass{tlc3exa}
\pagestyle{empty}
\setcounter{page}{6}
\setlength\textwidth{147.0pt}
%StartShownPreambleCommands
\usepackage{newpxtext,newpxmath}
%StopShownPreambleCommands

\begin{document}
In running text: $ \sum \smallsum_{i=1}^n  \prod
                   \smallprod_x^y \smallcoprod\limits_z $!
\[ \overgroup{AB} \enspace \overgroupra{CDEF} \enspace
\overgroupla{\ldots LMN\ldots} \enspace \widering{XYZ} \]
\[ \undergroup{abc} \enspace \undergroupra{de} \enspace
                              \undergroupla{\ldots xyz}\]
\end{document}
